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Finding the Fourth Proportional to 103,992.68, 155,874.80 and 40,793.78

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Solution

The fourth proportional to 103,992.68, 155,874.80 and 40,793.78 is: 61,145.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,992.68 : 155,874.80 = 40,793.78 : x
  2. Step 2: Convert to fraction form
    103,992.68/155,874.80 = 40,793.78/x
  3. Step 3: Cross multiply
    103,992.68x = 155,874.80 × 40,793.78
  4. Step 4: Simplify right side
    103,992.68x = 6,358,722,298.74
  5. Step 5: Solve for x
    x = 6,358,722,298.74/103,992.68
  6. Step 6: Final answer
    x = 61,145.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.